Question bout link between AGB and CGB

[Angrist]

I have a Japanese AGB, so I can't read the manual. But it does show a pic of an AGB connected to a CGB, both with a normal GB game in it. It shows a huge red cross though the pic. So I guess it doesn't work or could do damage so I never tried it.

But now me and my bro wanna trade soe PKMN between Gold and Silver, but we hate using our old huge GameBoy. We want to use our AGB and CGB.

So my question is: could you look that up in you manual??
Thanks a lot. I'll also send an e-mail to Nintendo Amerika and Europe (let's see who's faster).